This project uses a 4-channel Lora remote controller to independently control 4-Channel Lora Relay 10A. Each button on the remote corresponds to a specific relay, allowing users to remotely switch ...

Several makes of multi channel relay boards that are controlled over an RS232 serial port. I am testing with a model that uses a ULN2803A chip also noted as a darlington array and an RS232 level ...

The new IA-3133-U2i Relay Multiplexer Board has 32 Differential Channels or 16 Quad Channels, with a contact rating of 2 Amp @ 30VDC and 1Amp @ 115VAC. September 20, 2012 - Online-Devices announced a ...